Matos was the defending Olympic welterweight champion. At the 2003 Pan American Games, Matos was defeated 4–1 by eventual gold medalist Steven López. He was not a medalist at Athens in 2004, being ousted by Mexican Estrada 8–7, in the preliminary round of 16.
In the bronze medal match in the men's 80+ kg class at the 2008 Summer Olympics, Matos was set against Kazakhstan's Arman Chilmanov. After he incurred a foot injury, he took a Kyeshi. Under World Taekwondo Federation tournament rules, players sustaining injury are allowed one minute of Kyeshi time, at the end of which the competitor in question must return to the center of the ring to resume the fight, request further time, or forfeit the match. Swedish referee Chakir Chelbat gave a time warning at 40 seconds, but Kyeshi elapsed without Matos returning to the center. The referee ruled while he was sitting awaiting medical attention that he had taken too long during his time out and subsequently ruled he had retired. "To me it was obvious he was unable to continue," his opponent Arman Chilmanov of Kazakhstan said. "His toe on his left foot was broken." After Chilmanov was declared the winner, Matos briefly argued with Chelbat and then kicked him in the face, punched a judge in the arms, and spat on the floor of the arena before being escorted out by security with his coach, Leudis Gonzalez. After the fight, Yang Jin-suk, the secretary general of the World Taekwondo Federation, apologised and said "This is an insult to the Olympic vision, an insult to the spirit of taekwondo and, in my opinion, an insult to mankind." Hours later, the WTF banned Matos and González from WTF-sanctioned events for life; in a statement announcing its decision, the WTF called Matos' behaviour "a strong violation of the spirit of taekwondo and the Olympic Games." It also deleted Matos' results from the 2008 Olympics from the records. Matos's coach Leudis González said of the referee's initial decision to end the fight, "He was too strict..." and accused the Kazakhstan team of offering bribes. Former Cuban presidentFidel Castro also defended Matos, saying he was rightfully indignant over his disqualification. "I saw when the judges blatantly stole fights from two Cuban boxers in the semifinals," Castro wrote.
Subsequent activities
In a 2018 interview with the Havana Times, Matos expressed his regret at his actions at the 2008 Summer Olympics, stating that he had wished to continue his taekwondo career at least until the next year's World Championships. At the time of this interview, Matos worked as a trainer at a Havana gym.
